Color "caught" tasks differently

[romain-intel]

Summary

Right now tasks are either marked "green" (done successfully), "light green" (running) or "red" (failed); we could introduce a new color to mark tasks that have failed but their failure was caught with the @catch decorator.

Motivation

Better visibility/insight about what is going on in the workflow. It would also better support patterns of "this has failed but I don't want to stop".

Describe alternatives you've considered

N/A

Additional context

N/A